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提出了啤酒花中单宁的流动注射分析（ＦＩＡ）法。本法将单宁注人Ｆ（Ⅲ）载流中，然后与１，１０－二氮菲的０．０３ｍｌｎｏｌ／ＬＨ２ＳＯ４溶液混合，混合物经１００ｃｍ反应盘管，生成的１，１０－二氮菲－Ｆｅ（Ⅱ）络合物在 ５０６ ｎｍ波长处检测。方法快速、准确，测样频率为７１样／ｈ，相对标准偏差为１． １％，测定单宁的线性范围为 ０．００－ ３００ ｍｇ／Ｌ，检测限 ０．８４ ｍｇ／Ｌ，成功地用于啤酒花中单宁的测定。
A flow injection analysis (FIA) method of tannin in hops was proposed. In this method, the tannin is injected into the F (III) carrier and then mixed with the solution of 1,10-phenanthroline 0.03 mlnol / LH2SO4. The mixture is passed through a 100 cm reaction coil to produce 1,10-phenanthroline- Fe (Ⅱ) complex was detected at 506 nm. The method is rapid and accurate, with a sampling frequency of 71 samples / h and a relative standard deviation of 1. 1%. The linear range of tannin was 0.00-300 mg / L and the limit of detection was 0.84 mg / L, which was successfully used to determine tannin in hops.